The object of Minesweeper is to locate all the mines as quickly as possible without uncovering any of them.

The number in the upper-left of the game board indicates the number of flags left to place. The number on the upper-left of the game board indicates how many seconds have elapsed since the game started. The button between these counters starts a new game.

Click a tile on the minefield to uncover it. A number tile ( - ) indicates how many mines are in the tiles surrounding it.

You can right-click a tile to flag it as a mine ( ) to help you keep track. Flagging a tile decreases the mine counter in the upper left of the window. If the marking feature is enabled (Game > Marks), right-clicking a tile twice will mark the tile ( ) if you're unsure about it. Right-clicking the tile once more will clear it.

Uncovering a mine tile ( ) will cause you to lose the game. Correctly flagged tiles will remain as flags, while incorrectly flagged tiles will show a crossed-out mine ( ).

The game ends when a mine is uncovered, or the last safe tile is uncovered.

Tips:

Middle-clicking a number tile will uncover all of its surrounding unflagged tiles if the number of flags around it matches the number indicated on the tile.

You can stop the timer for the duration of the game by holding the middle mouse button on the game board and then pressing ESC.